17. 선생님 퀴즈
1234567891011121314151617181920212223242526
#include <stdio.h>
#include <stdlib.h>
int main(void) {
int N = 0;
scanf("%d", &N);
for (int i = 0; i < N; i++) {
int card = 0, result = 0, originRes = 0;
scanf("%d %d", &card, &result);
for (int i = 1; i <= card; i++) {
originRes += i;
}
if (originRes == result) {
printf("YES\n");
} else {
printf("NO\n");
}
}
return 0;
}
C
INFO